Best 4TB NAS hard drives
We track 9 currently-sold 4TB NAS drives from WD, Seagate and Toshiba, ranked by real-world failure rate. None have large-scale Backblaze failure data yet, so they are ranked on manufacturer class and specs. Best value is the Seagate ST4000VX016 at about $49.53/TB.
| Drive | Capacity | Tech | Class | Interface | AFR | £/TB | Price | |
|---|---|---|---|---|---|---|---|---|
| 1 |
WD40EFPX
WD Red Plus
|
4 TB | CMR | NAS | SATA | - | £51.71 | £207 |
| 2 |
WD4005FFBX
WD Red Pro
|
4 TB | CMR | NAS-Pro | SATA | - | £44.99 | £180 |
| 3 |
WD4004FRYZ
WD Gold
|
4 TB | CMR | Enterprise | SATA | - | £68.12 | £272 |
| 4 |
ST4000VN006
Seagate IronWolf
|
4 TB | CMR | NAS | SATA | - | £40.00 | £160 |
| 5 |
ST4000NT001
Seagate IronWolf Pro
|
4 TB | CMR | NAS-Pro | SATA | - | £46.25 | £185 |
| 6 |
ST4000VX016
Seagate SkyHawk
|
4 TB | CMR | Surveillance | SATA | - | £39.00 | £156 |
| 7 |
HDWG440
Toshiba N300
|
4 TB | CMR | NAS | SATA | - | - | - |
| 8 |
HDWR440
Toshiba X300
|
4 TB | CMR | Desktop | SATA | - | £89.79 | £359 |
| 9 |
WD40EZAX
WD Blue
|
4 TB | CMR | Desktop | SATA | - | £102.81 | £411 |
Ranked by measured failure rate (Backblaze AFR). $/TB uses the cheapest live price where available.
Every drive here is a CMR (RAID-safe) 4TB model in current production. For a NAS or RAID array, pick the lowest failure rate you can afford; enterprise drives (Exos, Ultrastar, MG) trade some noise and power draw for the longest workload ratings. See how to choose a NAS drive for the full rundown.
Frequently asked questions
- What is the most reliable 4TB NAS drive?
- None of the 4TB drives have large-scale Backblaze failure data yet; choose by manufacturer class and warranty.
- Are 4TB NAS drives CMR or SMR?
- Every 4TB drive we recommend for NAS use is CMR (conventional recording), the RAID-safe choice. We exclude SMR drives from NAS picks.